BATTERY CELL

Abstract

A battery cell is disclosed. The battery cell of the present disclosure may include: an electrode arrangement comprising a plurality of electrodes and a plurality of separators; a housing body configured to receive the electrode arrangement and having an opening formed therein; a housing cap comprising a cap plate coupled to the housing body to cover the opening; electrode terminals coupled to the cap plate; tabs coupled to the plurality of electrodes and electrically connected to the electrode terminals; and a sealing plate formed and configured in a plate shape to cover and seal the tabs.

Description

[Technical field]

[0001] The present disclosure relates to a battery cell. [State of the art]

[0002] In a secondary battery, an electrode assembly is welded to a lug, and the lug is connected to an electrode terminal. While a current collector of the electrode assembly is welded to the lug, an electrolyte, which is a liquid electrolyte in the secondary battery, can be injected into the electrode assembly. If the secondary battery is subjected to vibrations or changes in orientation, the electrolyte can seep between the current collector and the lug.

[0003] If electrolyte penetrates between the current collector and the mounting plate, there is a risk of corrosion between the current collector and the mounting plate. For example, if the electrolyte seeps into the interface between the current collector and the mounting plate, the bond strength between them can be weakened. [Summary of the invention][Problems to be solved by the invention]

[0004] According to one aspect of the present disclosure, it is a task to provide a battery cell that suppresses electrode corrosion. [Means of solving problems]

[0005] A battery cell according to the present disclosure may include: an electrode assembly comprising a plurality of electrodes and a plurality of separators; a housing body configured to receive the electrode assembly and having an opening formed therein; a housing cap comprising a cap plate coupled to the housing body to cover the opening; electrode terminals coupled to the cap plate; tabs coupled to the plurality of electrodes and electrically connected to the electrode terminals; and a sealing plate formed and configured in a plate shape to cover and seal the tabs. [Beneficial effects]

[0006] According to one embodiment of the present disclosure, a battery cell can be provided which suppresses electrode corrosion.

[0007] The battery cell of the present disclosure can be widely applied in fields of green technology, such as electric vehicles, battery charging stations, as well as solar power generation, wind power generation and the like, which use the batteries.

[0008] The battery cell of the present disclosure can be used in environmentally friendly electric vehicles, hybrid vehicles and the like, which aim to mitigate climate change by reducing air pollution and greenhouse gas emissions. [Brief description of the drawings] Fig. Figure 1 is a perspective view illustrating a battery cell according to an embodiment of the present disclosure. Fig. Figure 2 is a perspective view illustrating a housing cap according to an embodiment of the present disclosure. Fig. Figure 3 is a perspective exploded view illustrating an electrode arrangement in which an uncoated portion of a cathode and an uncoated portion of an anode extend from coated parts in opposite directions. Fig. 4 is a view that is in Fig. Figure 3 illustrates the electrode arrangement in a stacked state. Fig. Figure 5 is a perspective exploded view illustrating an electrode arrangement in which the uncoated part of the cathode and the uncoated part of the anode extend from the coated parts in the same direction. Fig. 6 is a view that is in Fig. Figure 5 illustrates the electrode arrangement in a stacked state. Fig. Figure 7 is a view illustrating a state in which tabs and the uncoated parts are coupled. Fig. Figure 8 is an enlarged view of area A in Fig. Figure 7 shows a cap plate positioned over the tabs. Fig. 9 is a perspective view of the in Fig. 2. Case cap shown from a different angle. Fig. 10 is a cross-sectional view of the in Fig. 9 shown case cap along line B1-B2. Fig. 11 is a cross-sectional view of the in Fig. 9 shown housing cap along line B1-B2, which shows a cap coupling part base and a cap coupling part wall forming an acute angle. Fig. Figure 12 is a view illustrating a sealing plate that defines the boundary between the tab and the in Fig. Covers the uncoated part shown in section 8. Fig. Figure 13 is a view illustrating a sealing plate according to an embodiment of the present disclosure. Fig. 14 is a cross-sectional view of the in Fig. 13 shown sealing plate along line D1-D2. Fig. 15 is a cross-sectional view of the in Fig. 13 shown sealing plate along line E1-E2. Fig. Figure 16 is a cross-sectional view of the tab, the uncoated part, the cap plate and the in Fig. 9 shown sealing plate along line C1-C2. Fig. Figure 17 is an enlarged cross-sectional view of area F in Fig. 16. [Emphasis of the invention]

[0009] The present disclosure will be described below with reference to the Fig. 1 to Fig. 17 described in detail. However, these are merely examples and the present disclosure is not limited to the specific embodiments described as examples.

[0010] In the present application, the coordinate system can be a Cartesian coordinate system. For example, a plane formed by the X-axis and the Y-axis can be a horizontal plane. The Z-axis can be perpendicular to the horizontal plane.

[0011] Fig. Figure 1 is a perspective view illustrating a battery cell according to an embodiment of the present disclosure. Fig. Figure 2 is a perspective view illustrating a housing cap 120 according to an embodiment of the present disclosure.

[0012] With reference to Fig. 1 and Fig. 2. A battery cell 10 can contain a casing 100. The casing 100 can form an outer surface of the battery cell 10. The casing 100 can define a space within it. The casing 100 can maintain rigidity. For example, the casing 100 can be made of a material that contains metal.

[0013] The housing 100 can contain a housing body 110. The housing body 110 can define a space within it. The housing body 110 can accommodate an electrode assembly 200 (see Fig. 3 to Fig. 6).

[0014] For example, the space formed in the housing body 110 can be open in one direction. In this case, there can be an opening formed in the housing body 110. That is, the space formed in the housing body 110 can be opened by an opening formed in the housing body 110. For example, the space formed in the housing body 110 can be open in an upward direction.

[0015] For another example, the space formed in the housing body 110 can be open in two directions. In this case, there can be two openings formed in the housing body 110. That is, the space formed in the housing body 110 can be opened by two openings formed in the housing body 110. The space formed in the housing body 110 can be open in an upward and a downward direction. The two openings formed in the housing body 110 can be referred to as a "first opening" and a "second opening".

[0016] The housing 100 can contain the housing cap 120. The housing cap 120 can contain a cap plate 121. The cap plate 121 can have a plate shape. The cap plate 121 can be coupled or connected to the housing body 110.

[0017] The housing cap 120 may contain a vent hole 122. The vent hole 122 may be a hole or opening formed in the cap plate 121. Through the vent hole 122, the space inside the housing 100 can communicate with the outside.

[0018] The housing cap 120 can contain a vent plate 125. The vent plate 125 can be coupled to the cap plate 121. For example, the vent plate 125 can be positioned in or inserted into the vent hole 122.

[0019] If a fire occurs inside the battery cell 10, the internal pressure of the casing 100 may increase. If the internal pressure of the casing 100 reaches or exceeds a predetermined pressure, the casing 100 may rupture, thereby damaging the electrode assembly 200 (see Fig. 3 to Fig. 6), which is contained in the housing 100, is exposed to the outside of the housing 100. In this case, there is a risk that the fire that has occurred inside battery cell 10 may spread to the adjacent battery cell 10.

[0020] The vent plate 125 may rupture if the internal pressure of the housing 100 becomes equal to or higher than a preset pressure. If the vent plate 125 ruptures, gas or the like may escape from inside the housing 100 to the outside of the housing 100. As the gas or the like escapes from inside the housing 100 to the outside of the housing 100, the internal pressure of the housing 100 may decrease.

[0021] The housing cap 120 can contain an injection hole 123. The injection hole 123 can be a hole or opening formed in the cap plate 121. An electrolyte can be injected into the housing 100 through the injection hole 123.

[0022] The housing cap 120 can contain a plug 126. The plug 126 can block the injection hole 123. The plug 126 can seal the injection hole 123. The plug 126 can be positioned in or inserted into the injection hole 123. The plug 126 can be coupled to the injection hole 123.

[0023] Even if a pressure required to tear the vent plate 125 is formed within the housing 100, the plug 126 can remain positioned in the injection hole 123 without being detached from the injection hole 123.

[0024] The housing cap 120 can contain an electrode opening 124. The electrode opening 124 can be an opening formed in the cap plate 121. The interior formed in the housing 100 can be connected to the exterior through the electrode opening 124.

[0025] A plurality of electrode openings 124 can be formed in the housing cap 120. For example, the housing cap 120 can contain a first electrode opening 124a and a second electrode opening 124b. The first electrode opening 124a and the second electrode opening 124b can be spaced apart from each other. The electrode opening 124 can contain or refer to at least one of the first electrode opening 124a and the second electrode opening 124b.

[0026] The battery cell 10 can contain an electrode terminal 150. The electrode terminal 150 can be connected or coupled to the electrode arrangement 200 (see Fig. 3 to Fig. 6) For example, the electrode connection 150 can protrude from the cap plate 121. In another example, the electrode connection 150 can be connected to an outer surface of the cap plate 121.

[0027] The electrode connection 150 can be coupled to the cap plate 121. For example, the electrode connection 150 can be coupled to the electrode opening 124. For example, a section of the electrode connection 150 can extend through the electrode opening 124 or be inserted into the electrode opening 124.

[0028] A variety of electrode connections 150 can be provided. For example, the battery cell 10 can include a first electrode connection 151 and a second electrode connection 152. The first electrode connection 151 can be coupled to the first electrode opening 124a. The second electrode connection 152 can be coupled to the second electrode opening 124b. The electrode connection 150 can include or refer to the first electrode connection 151 and / or the second electrode connection 152.

[0029] Fig. Figure 3 is a perspective exploded view illustrating an electrode arrangement in which an uncoated portion of a cathode and an uncoated portion of an anode extend from coated parts in opposite directions. Fig. 4 is a view that is in Fig. Figure 3 illustrates the electrode arrangement in a stacked state.

[0030] With reference to Fig. 3 and Fig. 4 can the battery cell 10 (see Fig. 1) The electrode arrangement 200 includes. The electrode arrangement 200 can include an electrode 210.

[0031] The electrode 210 can be made of a material containing a metal. For example, the electrode 210 can contain a current collector 215. The current collector 215 can contain a metal foil. For example, the current collector 215 of the anode can contain a copper foil. For example, the current collector 215 of the cathode can contain an aluminum foil.

[0032] The electrode 210 can have two surfaces. For example, the electrode 210 can have a top surface and a bottom surface. The thickness direction of the electrode 210 can correspond to a vertical direction. For example, the thickness direction of the electrode 210 can correspond to the Z-axis direction.

[0033] The electrode 210 can contain a coating part 211. The coating part 211 can contain a section of the current collector 215. The coating part 211 can contain an active material layer 216 applied to a section of the current collector 215. The active material layer 216 can contain an active material, a conductive material, and a binder.

[0034] The active material layer 216 can be applied to or coated on the current collector 215 of the coating part 211. For example, the active material layer 216 can be applied to or coated on one surface of the current collector 215 of the coating part 211. In another example, the active material layer 216 can be applied to or coated on both surfaces of the current collector 215 of the coating part 211. The direction in which both surfaces of the current collector 215 face each other can be parallel to a direction in which several electrodes 210 are stacked.

[0035] The electrode 210 can contain an uncoated part 212. The uncoated part 212 can extend from the coated part 211 of the current collector 215. The uncoated part 212 can extend from one side of the coated part 211. One section of the current collector 215 can be contained within the coated part 211, and another section of the current collector 215 can be contained within the uncoated part 212.

[0036] The electrode 210 can contain a first electrode 210a and a second electrode 210b. For example, the electrode 210 can contain or refer to the first electrode 210a and / or the second electrode 210b.

[0037] The positive electrode can be one of the first electrode 210a and the second electrode 210b, and the negative electrode can be another of the first electrode 210a and the second electrode 210b. The first electrode 210a and the second electrode 210b can overlap.

[0038] For example, the first electrode 210a and the second electrode 210b can be stacked vertically. Alternatively, several first electrodes 210a and several second electrodes 210b can be stacked alternately vertically.

[0039] The electrode arrangement 200 can include a separator 220. The separator 220 can be arranged between the first electrode 210a and the second electrode 210b. For example, the separator 220 can be positioned between the first electrode 210a and the second electrode 210b, which are vertically adjacent.

[0040] Some of the multiple separators 220 can face a lower surface of the first electrode 210a and an upper surface of the second electrode 210b. Others of the multiple separators 220 can face an upper surface of the first electrode 210a and a lower surface of the second electrode 210b. The separator 220 can face the coating part 211 of the electrode 210.

[0041] The uncoated part 212 can have a shape that protrudes from the coated part 211. For example, the direction in which the uncoated part 212 of the first electrode 210a extends from the coated part 211 can be opposite to the direction in which the uncoated part 212 of the second electrode 210b extends from the coated part 211.

[0042] For example, the uncoated part 212 of the first electrode 210a can extend from a first side of the coated part 211. For example, the uncoated part 212 of the second electrode 210b can extend from a second side of the coated part 211. The first and second sides of the coated part 211 can be positioned opposite each other.

[0043] Fig. Figure 5 is a perspective exploded view illustrating an electrode arrangement in which the uncoated part of the cathode and the uncoated part of the anode extend from the coated parts in the same direction. Fig. 6 is a view that is in Fig. Figure 5 illustrates the electrode arrangement in a stacked state.

[0044] With reference to Fig. 5 and Fig. 6 For example, the direction in which the uncoated part 212 of the first electrode 210a extends from the coated part 211 can be the same as the direction in which the uncoated part 212 of the second electrode 210b extends from the coated part 211.

[0045] For example, the uncoated part 212 of the first electrode 210a and the uncoated part 212 of the second electrode 210b can extend from one side of the coated part 211. The uncoated part 212 of the first electrode 210a and the uncoated part 212 of the second electrode 210b can be spaced apart from each other along one side of the coated part 211.

[0046] With reference to Fig. 1 to Fig. 6. The cap plate 121 can be coupled or connected to the housing body 110 at an opening formed therein. If one opening is formed in the housing body 110, one cap plate 121 can be provided. If two openings are formed in the housing body 110, two cap plates 121 can be provided.

[0047] If a cap plate 121 is present, the first electrode terminal 151 and the second electrode terminal 152 can be coupled to the single cap plate 121. In the battery cell 10 with a cap plate 121, the Fig. 5 and Fig. The electrode arrangement 200 shown can be easily connected to the electrode connection 150.

[0048] If there are two cap plates 121, the housing 100 can contain a first cap plate 121 and a second cap plate 121. The first electrode terminal 151 can be coupled to the first cap plate 121, and the second electrode terminal 152 can be coupled to the second cap plate 121. In the battery cell 10 with two cap plates 121, the Fig. 3 and Fig. The electrode arrangement shown in section 4 can be easily connected to the electrode connection 150.

[0049] Fig. Figure 7 is a view illustrating a state in which the tabs and the uncoated parts are coupled. Fig. Figure 8 is an enlarged view of area A in Fig. Figure 7 shows a cap plate positioned over the tabs.

[0050] With reference to Fig. 7 and Fig. 8. The electrode arrangement 200 can be subdivided into a plurality of electrode arrangement segments 200x and 200y. For example, the electrode arrangement 200 can contain a first electrode arrangement segment 200x and a second electrode arrangement segment 200y.

[0051] The electrode arrangement segments 200x and 200y can contain or refer to at least one of the first electrode arrangement segment 200x and the second electrode arrangement segment 200y.

[0052] The electrode arrangement segments 200x and 200y can accommodate multiple electrodes 210 (see Fig. 5 and Fig. 6) and at least one 220 separator (see Fig. 5) included. The multiple electrodes 210 (see Fig. 5 and Fig. 6) and at least one 220 separator (see Fig. 5) can be stacked alternately in the vertical direction. The multiple electrodes 210 (see Fig. 5 and Fig. 6) several first electrodes 210a (see Fig. 5) and several second electrodes 210b (see Fig. 5) which are arranged alternately.

[0053] The uncoated parts 212 of the multiple first electrodes 210a of the first electrode arrangement segment 200x can be overlapped and coupled together. The uncoated parts 212 of the multiple second electrodes 210b of the first electrode arrangement segment 200x can be overlapped and coupled together.

[0054] The uncoated parts 212 of the multiple first electrodes 210a of the second electrode arrangement segment 200y can be overlapped and coupled together. The uncoated parts 212 of the multiple second electrodes 210b of the second electrode arrangement segment 200y can be overlapped and coupled together.

[0055] Battery cell 10 (see Fig. 1) can contain a tab 300. The tab 300 can connect the first electrode arrangement segment 200x and the second electrode arrangement segment 200y.

[0056] For example, the tab 300 can connect the uncoated part 212 of the first electrode assembly segment 200x and the uncoated part 212 of the second electrode assembly segment 200y. For example, one end of the tab 300 can be coupled to the uncoated part 212 of the first electrode assembly segment 200x and the other end of the tab 300 can be coupled to the uncoated part 212 of the second electrode assembly segment 200y.

[0057] The tab 300 can be coupled to the uncoated part 212. For example, the tab 300 and the uncoated part 212 can be coupled to each other by welding. For example, the tab 300 and the uncoated part 212 can be coupled to each other by laser welding. For example, a surface of the tab 300 and a surface of the uncoated part 212 can be welded together while in contact with each other.

[0058] Battery cell 10 (see Fig. 1) can contain multiple tabs of 300. For example, the battery cell can contain 10 (see Fig. 1) Contain a first tab 300a and a second tab 300b. The tab 300 can contain or refer to the first tab 300a and / or the second tab 300b.

[0059] One end of the first tab 300a can be coupled to the uncoated part 212 of the first electrode 210a of the first electrode arrangement segment 200x and the other end of the first tab 300a can be coupled to the uncoated part 212 of the first electrode 210a of the second electrode arrangement segment 200y.

[0060] Likewise, one end of the second tab 300b can be coupled to the uncoated part 212 of the second electrode 210b of the first electrode arrangement segment 200x and the other end of the second tab 300b can be coupled to the uncoated part 212 of the second electrode 210b of the second electrode arrangement segment 200y.

[0061] The first electrode assembly segment 200x and the second electrode assembly segment 200y can be electrically connected. For example, the first electrode assembly segment 200x and the second electrode assembly segment 200y can be electrically connected in parallel.

[0062] The tab 300 can be connected to the electrode connection 150 (see Fig. 1) For example, the tab 300 can be electrically connected to the electrode connection 150 (see Fig. 1) For example, the first tab 300a can be electrically connected to the first electrode terminal 151 (see Fig. 1) and the second tab 300b can be electrically connected to the second electrode connection 152 (see Fig. 1).

[0063] The first tab 300a can face the first electrode opening 124a. The first tab 300a can be positioned below the first electrode opening 124a. The second tab 300b can face the second electrode opening 124b. The second tab 300b can be positioned below the second electrode opening 124b.

[0064] When the electrolyte is injected into housing 100 and fills it (see Fig. 1) if the tab 300 is positioned on the side of the electrode assembly 200 and not on it, or if the battery cell 10 (see Fig. 1) If shaken, the electrolyte can seep into a gap between the tab 300 and the uncoated part 212.

[0065] If electrolyte seeps into the gap between the tab 300 and the uncoated part 212, there is a risk of corrosion between the tab 300 and the uncoated part 212. For example, if electrolyte seeps into the gap between the tab 300 and the uncoated part 212, the bond strength between the tab 300 and the uncoated part 212 may be weakened. Therefore, the interface between the tab 300 and the uncoated part 212 must be sealed.

[0066] Fig. 9 is a perspective view of the in Fig. 2. Case cap shown from a different direction.

[0067] With reference to Fig. 9 can be considered an inner surface of the housing cap 120. Meanwhile, in Fig. 2. An outer surface of the housing cap 120 is considered. The outer surface of the housing cap 120 can face or be directed towards an outer surface of the housing 100 (see Fig. 1) The inner surface of the housing cap 120 can face the electrode arrangement 200 (see Fig. 3 to Fig. 6).

[0068] The housing cap 120 can contain a cap coupling element 127. The cap coupling element 127 can be formed in the cap plate 121. For example, the cap coupling element 127 can be formed on an inner surface of the cap plate 121. For example, the cap coupling element 127 can have a recessed shape on the inner surface of the cap plate 121. For example, the cap coupling element 127 can be concave on the inner surface of the cap plate 121.

[0069] The cap coupling part 127 can be adjacent to the electrode opening 124. The number of cap coupling parts 127 can correspond to the number of electrode openings 124. For example, the cap coupling part 127 can include a first cap coupling part 127a adjacent to the first electrode opening 124a. For example, the cap coupling part 127 can include a second cap coupling part 127b adjacent to the second electrode opening 124b.

[0070] Each of the first cap coupling parts 127a and the second cap coupling parts 127b can be provided multiple times. For example, the first cap coupling part 127a can contain a plurality of first cap coupling parts 127a. For example, the first cap coupling part 127a can contain a pair of first cap coupling parts 127a. For example, the second cap coupling part 127b can contain a plurality of second cap coupling parts 127b. For example, the second cap coupling part 127b can contain a pair of second cap coupling parts 127b.

[0071] The first electrode opening 124a can be positioned between the pair of first cap coupling parts 127a, and the second electrode opening 124b can be positioned between the pair of second cap coupling parts 127b.

[0072] Fig. 10 is a cross-sectional view of the in Fig. 9 shown case cap along line B1-B2.

[0073] With reference to Fig. 10. The cap coupling part 127 can have a recessed shape on the inner surface of the cap plate 121. The cap coupling part 127 can be concave. The cap coupling part 127 can face an interior of the housing 100 (see Fig. 1) The cap coupling part 127 can face the electrode arrangement 200 (see Fig. 3 to Fig. 6).

[0074] The cap coupling part 127 can include a cap coupling part base 127b. The cap coupling part base 127b can face the interior of the housing 100 (see Fig. 1) or the electrode arrangement 200 (see Fig. 3 to Fig. 6).

[0075] The cap coupling part 127 can contain a cap coupling part wall 127w. The cap coupling part wall 127w can extend vertically from an inner surface of the cap plate 121 and be connected to the cap coupling part base 127b.

[0076] The cap coupling section 127w can be curved from the inner surface of the cap plate 121 and extend to the cap coupling section base 127b. The cap coupling section 127w can be perpendicular to the inner surface of the cap plate 121. The cap coupling section 127w can be perpendicular to the cap coupling section base 127b.

[0077] Fig. 11 is a cross-sectional view of the in Fig. 9 shown housing cap along line B1-B2, which shows the cap coupling part base and the cap coupling part wall forming an acute angle.

[0078] With reference to Fig. 11. The cap coupling part wall 127w can form an acute angle with the cap coupling part base 127b. For example, the cap coupling part wall 127w can be inclined towards the cap coupling part base 127b.

[0079] An upper end of the cap coupling part wall 127w can be connected to the cap coupling part base 127b. The upper end of the cap coupling part wall 127w can form a closed loop. A lower section of the cap coupling part wall 127w can be connected to the inner surface of the cap plate 121. The lower section of the cap coupling part wall 127w can form a closed loop.

[0080] The area of ​​the closed loop formed by the upper end of the cap coupling part wall 127w can be larger than that of the closed loop formed by the lower end of the cap coupling part wall 127w. In other words, the area defined by the perimeter of the cap coupling part base 127b can be larger than that of the closed loop formed by the lower section of the cap coupling part wall 127w.

[0081] Fig. Figure 12 is a view illustrating a sealing plate that defines the boundary between the tab and the in Fig. Covers the uncoated part shown in section 8.

[0082] With reference to Fig. 12 can be the battery cell 10 (see Fig. 1) Includes a sealing plate 500. The sealing plate 500 can be in the form of a plate or a circuit board. The sealing plate 500 can have two surfaces.

[0083] A large number of sealing plates 500 can be provided. For example, the battery cell 10 (see Fig. 1) comprising a first sealing plate 500a and a second sealing plate 500b. The sealing plate 500 can contain or refer to at least one of the first sealing plate 500a and the second sealing plate 500b.

[0084] The sealing plate 500 can cover the tab 300. For example, a surface of the sealing plate 500 can face or touch a surface of the tab 300. For example, an upper surface of the sealing plate 500 can face or touch a lower surface of the tab 300. An upper surface of the tab 300 can face the lower surface or the inner surface of the cap plate 121.

[0085] A large number of sealing plates 500 can be provided. For example, the battery cell 10 (see Fig. 1) the multiple sealing plates contain 500. For example, the battery cell can contain 10 (see Fig. 1) The first sealing plate 500a and the second sealing plate 500b are included. The sealing plate 500 can contain or refer to at least one of the first sealing plate 500a and the second sealing plate 500b.

[0086] The first sealing plate 500a can cover the first tab 300a. The first sealing plate 500a can be coupled to the first tab 300a. The first sealing plate 500a can cover one end of the uncoated part 212 of the first electrode 210a. The first sealing plate 500a can be coupled to the end of the uncoated part 212 of the first electrode 210a.

[0087] The second sealing plate 500b can cover the second tab 300b. The second sealing plate 500b can be coupled to the second tab 300b. The second sealing plate 500b can cover one end of the uncoated part 212 of the second electrode 210b. The second sealing plate 500b can be coupled to the end of the uncoated part 212 of the second electrode 210b.

[0088] The sealing plate 500 can seal a boundary between the tab 300 and the uncoated part 212. The sealing plate 500 can seal a boundary between the tab 300 and the sealing plate 500. The sealing plate 500 can seal a boundary between the tab 300 and the cap plate 121.

[0089] The sealing plate 500 can insulate the tab 300 from the electrolyte. For example, the sealing plate 500 can insulate the tab 300 from an interior formed in the housing body 110 (see Fig. 1) Therefore, the sealing plate 500 can prevent the electrolyte injected into the housing 100 (see Fig. 1) comes into contact with tab 300.

[0090] Fig. Figure 13 is a view illustrating a sealing plate according to an embodiment of the present disclosure. Fig. 14 is a cross-sectional view of the in Fig. 13 shown sealing plate along line D1-D2. Fig. 15 is a cross-sectional view of the in Fig. 13 shown sealing plate along line E1-E2.

[0091] With reference to Fig. 13 to Fig. 15. The sealing plate 500 can have two surfaces. For example, the sealing plate 500 can contain an inner surface 500i. The inner surface 500i can be a surface of the sealing plate 500. The inner surface 500i can be the tab 300 (see Fig. 9) or the cap plate 121 (see Fig. 9) facing or directed towards it. The inner surface of the 500i plate can be in Fig. 13 are considered.

[0092] The sealing plate 500 can, for example, contain an outer plate surface 500t. The outer plate surface 500t can be the other surface of the sealing plate 500. The outer plate surface 500t can correspond to the coating part 211 (see Fig. 5) the electrode arrangement 200 (see Fig. 5) be turned towards or directed towards it.

[0093] The sealing plate 500 can include a plate contact surface 510. The plate contact surface 510 can, for example, be formed on the inner surface 500i of the plate. For example, the plate contact surface 510 can be at least one section of the inner surface 500i of the plate. The plate contact surface 510 can be subdivided into a plurality of sections.

[0094] For example, the plate contact surface 510 can contain a cap contact surface 511. The cap contact surface 511 can be formed or positioned on the inner plate surface 500i. The cap contact surface 511 can be the cap plate 121 (see Fig. 12) touch or the cap plate 121 (see Fig. 12) be turned towards.

[0095] For example, the plate contact surface 510 can contain a contact surface 512 of an uncoated part. The contact surface 512 of an uncoated part can be formed or positioned on the plate's inner surface 500i. The contact surface 512 of an uncoated part can be the uncoated part 212 (see Fig. 12) touch or the uncoated part 212 (see Fig. 12) be turned towards.

[0096] For example, the plate contact surface 510 can contain a tab contact surface 513. The tab contact surface 513 can be formed or positioned on the inner plate surface 500i. The tab contact surface 513 can be the tab 300 (see Fig. 12) touch or the tab 300 (see Fig. 12) be turned towards.

[0097] The plate contact surface 510 can be concave. For example, at least one section of the inner plate surface 500i can be concave. The outer plate surface 500t can, for example, be flat.

[0098] A step can be formed at any boundary between any two of the cap contact surfaces 511, the contact surface 512 of an uncoated part, and the tab contact surface 513. For example, a step can be formed at the boundary between the cap contact surface 511 and the contact surface 512 of an uncoated part. For example, a step can be formed at the boundary between the contact surface 512 of an uncoated part and the tab contact surface 513. For example, a step can be formed at the boundary between the cap contact surface 511 and the tab contact surface 513.

[0099] The sealing plate 500 can include a plate coupling element 520. The plate coupling element 520 can be formed or coupled to the inner surface 500i of the plate. For example, the plate coupling element 520 can extend from the inner surface 500i of the plate.

[0100] The plate coupling part 520 can be coupled to the housing cap 120 (see Fig. 9). For example, the plate coupling part 520 can be coupled to the cap plate 121 (see Fig. 12). For example, the plate coupling part 520 can be coupled to the cap coupling part 127 (see Fig. 9).

[0101] The plate coupling part 520 can include a plate cap coupling part base 520b. The plate cap coupling part base 520b can face or touch the cap coupling part base 127b (see Fig. 10 and Fig. 11).

[0102] The plate coupling part 520 can include a plate coupling partial wall 520w. The plate coupling partial wall 520w can be configured to extend from the inner surface of the plate 500i to the base of the plate cap coupling part 520b. The plate coupling partial wall 520w can face or touch the cap coupling partial wall 127w (see Fig. 10 and Fig. 11).

[0103] The shape of the plate coupling part 520 can correspond to that of the cap coupling part 127 (see Fig. 10 and Fig. 11). For example, the shape of the plate cap coupling part base 520b can correspond to that of the cap coupling part base 127b (see Fig. 10 and Fig. 11). For example, the shape of the plate coupling partition 520w can correspond to that of the cap coupling partition 127w (see Fig. 10 and Fig. 11).

[0104] For example, if, as in Fig. 11 shown, the cap coupling partial wall 127w (see Fig. 11) the cap coupling part base 127b is obliquely turned towards the plate coupling part 520 and the cap coupling part 127 (see Fig. 10 and Fig. 11) are coupled together, the cap coupling partial wall 127w (see Fig. 11) are engaged with the plate coupling partial wall 520w. That is, the cap coupling partial wall 127w (see Fig. 11) can prevent the sealing plate 500 from separating from the cap plate 121 (see Fig. 9).

[0105] Fig. Figure 16 is a cross-sectional view of the tab, the uncoated part, the cap plate and the in Fig. 9 shown sealing plate along line C1-C2. Fig. Figure 17 is an enlarged cross-sectional view of area F in Fig. 16.

[0106] With reference to Fig. 16 and Fig. 17. The sealing plate 500 can cover a boundary between the uncoated part 212 and the tab 300. The sealing plate 500 can cover the tab 300.

[0107] Battery cell 10 (see Fig. 1) May contain a sealing aid element 600. The sealing aid element 600 may cover the tab 300. The sealing aid element 600 may cover one circumference of the tab 300.

[0108] The sealing aid 600 can be in the form of a foil or film. For example, the sealing aid 600 can be made of a silicone material. One surface of the sealing aid 600 can contact the tab 300, and the other surface of the sealing aid 600 can contact the sealing plate 500.

[0109] The sealing aid 600 may contain an adhesive. For example, the sealing aid 600 may be applied to the tab 300. The sealing aid 600 may, for example, be applied to the circumference of the tab 300.

[0110] The sealing aid 600 can bind the sealing plate 500 to the tab 300. The sealing aid 600 can bind the sealing plate 500 to the circumference of the tab 300.

[0111] For example, the sealing aid element 600 can bind the sealing plate 500 to the boundary between the tab 300 and the uncoated part 212. For example, the sealing aid element 600 can bind the sealing plate 500 to the boundary between the cap plate 121 (see Fig. 12) and the uncoated part 212. For example, the sealing aid 600 can bind the sealing plate 500 to the boundary between the tab 300 and the cap plate 121 (see Fig. 12) bind.

[0112] The contents described above are merely examples of the application of the principles of this disclosure, and other configurations may also be included without deviating from the scope of this disclosure.

Claims

[1] Battery cell, comprising: an electrode arrangement comprising multiple electrodes and multiple separators; a housing body configured to accommodate the electrode assembly and having an opening formed therein; a housing cap containing a cap plate coupled to the opening of the housing body; Electrode connections that are coupled to the cap plate; Tabs that are coupled to the multiple electrodes and electrically connected to the electrode terminals; and a sealing plate which is formed and configured in a plate shape to cover and seal the tabs. [2] Battery cell according to claim 1, wherein each of the multiple electrodes comprises: a current collector formed from a metal foil; and an active material layer applied to a section of the pantograph. [3] Battery cell according to claim 2, wherein each of the multiple electrodes comprises: a coating part that includes the current collector section and the active material layer; and an uncoated part that extends from the coated part and is coupled to the tab as another section of the pantograph. [4] Battery cell according to claim 3, wherein the uncoated part of the multiple electrodes is positioned between the tab and the cap plate. [5] Battery cell according to claim 4, wherein one surface of the tab is coupled to the uncoated part and the other surface of the tab faces the sealing plate. [6] Battery cell according to claim 5, wherein the sealing plate is configured to: to seal a boundary between the uncoated part and the flap and to seal a boundary between the tab and the cap plate. [7] Battery cell according to claim 5, wherein the electrode terminals comprise: a first electrode connection; and a second electrode connection, spaced apart from each other and coupled to the cap plate, and The multiple electrodes include the following: several first electrodes that are electrically connected to the first electrode terminals; and several second electrodes that are electrically connected to the second electrode terminals. [8] Battery cell according to claim 7, wherein the tab comprises: a first tab that is electrically connected to the first electrode terminal and coupled to the uncoated parts of the multiple first electrodes; and a second tab that is electrically connected to the second electrode terminal and coupled to the uncoated parts of the multiple second electrodes. [9] Battery cell according to claim 8, wherein the sealing plate comprises: a first sealing plate configured to cover the first tab; and a second sealing plate configured to cover the second tab. [10] Battery cell according to claim 8, wherein the multiple electrodes and the multiple separators are stacked alternately in one direction, and the multiple first electrodes and the multiple second electrodes are arranged alternately in one direction. [11] Battery cell according to claim 5, wherein the electrode arrangement comprises: a first electrode arrangement segment connected to one end of the tab; and a second electrode arrangement segment that is connected to the other end of the tab. [12] Battery cell according to claim 11, wherein the uncoated part of the first electrode arrangement segment is coupled to one end of the tab and the uncoated part of the second electrode arrangement segment is coupled to the other end of the tab. [13] Battery cell according to claim 1, wherein the sealing plate comprises: an inner surface of the plate, arranged so that it faces the tab as a surface of the sealing plate; and a plate outer surface arranged so that it faces the multiple separators as the other side of the sealing plate, where a section of the inner surface of the plate is concave. [14] Battery cell according to claim 13, wherein the sealing plate comprises a plate contact surface formed on the inner surface of the plate, and the plate contact surface comprises the following: a cap contact surface formed on the inner surface of the plate, facing and touching the cap plate; and a tab contact surface that is formed on the inner surface of the plate and faces the tab and touches it. [15] Battery cell according to claim 14, wherein each of the multiple electrodes comprises: a coating component comprising a section of a current collector formed from a metal foil and an active material layer applied to the section of the current collector; and an uncoated part extending from the coated part and coupled to the tab as another section of the pantograph, wherein the plate contact surface further includes a contact surface of an uncoated part which is formed on the inner surface of the plate and faces the uncoated part and touches it. [16] Battery cell according to claim 15, wherein a step is formed at a boundary between two of the contact surfaces of an uncoated part, the tab contact surface and the cap contact surface. [17] Battery cell according to claim 1, further comprising a sealing aid element arranged between the tab and the sealing plate, wherein the sealing aid element comprises at least one of an adhesive and a film. [18] Battery cell according to claim 1, wherein the housing cap includes an electrode opening as an opening formed in the cap plate in which the electrode connection is positioned and the tab faces the electrode opening. [19] Battery cell according to claim 1, wherein the housing body includes a first opening and a second opening formed therein, the cap plate comprising: a first cap plate coupled to the first opening; and a second cap plate coupled to the second opening; the electrode connection includes the following: a first electrode connection coupled to the first cap plate; and a second electrode connection that is coupled to the second cap plate; the tab includes the following: a first tab that is electrically connected to the first electrode terminal; and a second tab that is electrically connected to the second electrode terminal; and the sealing plate comprises the following: a first sealing plate configured to cover the first tab; and a second sealing plate configured to cover the second tab. [20] Battery cell according to claim 19, wherein the first cap plate and the second cap plate are arranged opposite each other.

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